Let (aa) be any non- constant sequence in r such that anri= for all n 2 1, then (a)fan) is cauchy (b) (a) is bounded but not cauchy t te)is unbounded and not ca

Let (aa) be any non- constant sequence in R such that anri= for all n 2 1, then (a)fan) is Cauchy (b) (a) is bounded but not Cauchy t te)is unbounded and not Cauchy (d) () is Cauchy but not Bounded